Some Common Sense
Gents
We must all realize that aircraft of this vintage, that were designed around the PW100 Series engines, were capable of this.
Some of these Types ran into problems in the early days when PT6 experienced pilots "assumed" the PW100 engines governed props all the way to max reverse as the PT6 did.
Fast forward 25 or so years...and BINGO, it happens again. While the decision to protect the pilot from inFlt Beta has been taken by the Regulators, it does not excuse the pilots who routinely use it during flight from being the cause. In the case of the PNG accident, there was no significant turbulence, and why would he have his fingers near the triggers at 10,000 ft anyways (not to mention it is an unnatural arm position to have your fingers grip the triggers). UNLESS, of course, that it was common practice.
If he had used this little 'trick' in the circuit, and didn't understand how the prop controls worked and repeats the 'trick' at Vmo...BOOM!
Let's use a little common sense and follow the instructions.
Pilots shouldn't ALWAYS need automation to be protected from themselves.